clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `LIMIT BY` over an injective `GROUP BY` expression throws `NOT_FOUND_COLUMN_IN_BLOCK` when `optimize_injective_functions_in_group_by = 0`
- Bypass compression for small Native protocol frames
- Fix a hang, excessive memory usage and a crash on a filtered read of a Parquet file with a malformed schema
- Fix isNotDistinctFrom reporting NaN as equal for Nullable operands
- Rebuilt columns.txt takes types from live metadata; guard checks names only
- Fix `NOT_FOUND_COLUMN_IN_BLOCK` when an equi-key filter is pushed through a `FULL JOIN ... USING` chain
- Provide a Way to Query Server (and Cluster) Health Indicators
- RECOMPRESS TTL codec at CREATE is validated against global, not query, settings
- Remove unneeded `automatic_parallel_replicas_mode=0` pins from tests
- Parse a JSON date/time that declares no time zone in the session's one
- Docs
- C++ not yet supported